The new Recall is out now.

[Grantorino]

Would this happen with a new battery also?

Sponsored

 

[Dude]

This is what I do not understand about the description in the recall:

"If the battery suddenly degrades during a drive it can lead to a vehicle that is unable to restart after an auto stopstart event or experience a stall while coming to a stop at low speed."

I see many posts that blame the auto start/stop for the issue. I do not think that is entirely correct. I have never seen an issue like this on any other Ford's that I have owned that has had auto start/stop. Under normal conditions the auto start/stop will not engage if the battery charge is too low. If the car hasn't been driven for a few days or other factors auto start/stop will not activate and the message will say that the engine is on due to charging. So I do not understand how the auto start/stop will even engage if the battery charge is so low that the car will not be able to restart. Something else must be going on that caused the battery to discharge to point where the car could not restart and at the same time allowed the auto start/stop to engage. If auto start/stop is working normally it should be an early warning sign that something is wrong with the battery because if it is not charged enough the auto start/stop should not activate. I just hope that what ever the issue is it will be fixed by the recall.

That is because the many posts that blame the auto start/stop for the issue would be incorrect.

One clarification on your post assumptions, the auto stop start could be engaged and fully operational, all conditions including battery voltage nominal, upon the next stop, the vehicle shuts off and during that stop those conditions reach the point where now the vehicle will not start.

The issue seems pretty rare, only a handful of people have reported this.

The software update involves the BCM and PCM Calibrations, reading any more into what the report states is speculation.

 

[Cobrablues]

I'm disabling auto start/stop every single time I drive until the recall's complete. What a pain.

Well, I guess I will too. After using Forscan to disable the AS/AS feature and testing it, the little gremlin was back today.

 

[Dude]

It has been reported Ford has the BCM and PCM software ready for the recall

make your appointment ?

“Remedy: FORD MOTOR COMPANY HAS AUTHORIZED YOUR DEALER TO REPROGRAM THE POWERTRAIN CONTROL AND BODY CONTROL MODULES FREE OF CHARGE SOFTWARE AND LABOR.”

 

[sajohnson]

Would this happen with a new battery also?

Based on the description of the problem, yes.

Initially, with a fully charged (100% SOC) battery, everything would work fine, but if the charging system is not working properly, the new battery would become more and more discharged, and the problem would reoccur.

 

[Glamdring70]

I see many posts that blame the auto start/stop for the issue. I do not think that is entirely correct. I have never seen an issue like this on any other Ford's that I have owned that has had auto start/stop. Under normal conditions the auto start/stop will not engage if the battery charge is too low.

But what happens when the system thinks the charge level is 96% (due to defect), and the ASS kicks in, but the real charge is 37%?

 

[DWG]

But what happens when the system thinks the charge level is 96% (due to defect), and the ASS kicks in, but the real charge is 37%?

The recall is to recalibrate software to detect a sudden degradation of the battery and to increase alternator output when a sudden degradation is detected and provide notification to the driver. The Auto start stop already will not engage if the battery charge is below a certain level ( I do not know the level). So if somehow the auto start stop engages and the battery charge level suddenly drops to the point that the car can not restart it was not the auto start stop that caused the problem. Is the battery about to die because it has reached the end of its life or is the battery defective or is something draining the battery so quickly that the current system cannot detect the change in battery status. I do not know. If you read the description below you can see that the failure to restart after an auto start stop event is just one way that the car will shut down. The car could still shut down when coming to a stop at low speeds and I suspect disabling the auto start stop will not prevent a sudden shutdown of the vehicle in these cases. Hopefully the increase in alternator output when low charge is detected and a warning to the driver will give us enough time to avoid a complete shut down and get service to correct the condition (replace battery, maybe determine a cause if battery failure is premature.)


Part 573 Safety Recall Report 24V-267
Description of Defect :
Description of the Defect : An insufficient calibration strategy for detecting sudden battery degradations during a drive cycle can lead to (a) a vehicle that is unable to restart after an
auto start/stop event or (b) experience a stall while coming to a stop at low speed. Either may be accompanied by a loss of 12-volt accessories, including hazard lights.
FMVSS 1 : NR
FMVSS 2 : NR
Description of the Safety Risk : A loss of motive power can increase the risk of a crash.
Description of the Cause : The BCM and PCM calibrations are unable to detect a sudden change in the 12-volt battery State of Charge (SOC) during a drive cycle.

Identification of Any Warning that can Occur :
None

How Remedy Component Differs from Recalled Component :
The update BCM calibrations M1PT-14F390-ACG (Bronco Sport), NZ6T-14F390-ADD (Maverick Gas), NZ6T-14F390-BDB (Maverick HEV) will provide improved detection of 12V battery SOC during drive cycles, inhbit auto stop/start in the event of a low SOC, and provide notification to the driver if the battery is degraded. The updated PCM calibrations M1PA-12A650-UE (MY21), N1PA-12A650-AE (MY22), P1PA-12A650-AF (MY23), R1PA-12A650-AD (MY24) will increase the alternator output threshold to maintain vehicle operation if a low 12V battery SOC is
detected during a drive cycle.

 

[broncon0mad]

Not sure if anyone would know the answer to this but will this recall fix the Service Advancetrac, 4WD Fault, Pre-Collision Assist not available, Hill-Assist warning lights warning lights? My GOAT modes are no longer working because of it. Went to the dealership before the recall and they were gonna charge me to replace the AWD module.

 

[NMhunter]

X2 on the Auto Start/Stop being an early warning system. If it isn't working, it is probably time to put a charger on the battery for a night. Or a solar panel on the dash. I also carry a jump starter anytime I am out of town. I once hooked up my jump starter to a dead car battery (not my Sport) and drove a couple of miles before it gave out. It was only a 20 AH battery, so I didn't expect much more. But it would get you off the road.

If the AC is on, my AS/s usually doesn't come on, and doesn't stay on long if it does.

 

[Rogerthat898]

Ford mobile mechanic is scheduled to come out and do the software update recall on my '21 big bend on 5/31.
For reference my auto start/stop has always worked as it should and I have never charged or jump started my battery.

 

[Mark S.]

The recall is to recalibrate software to detect a sudden degradation...

Is the battery about to die because it has reached the end of its life or is the battery defective or is something draining the battery so quickly that the current system cannot detect the change in battery status.

Recalls like this don't typically provide much detail about the cause(s) of problems prompting them. The term "sudden degradation" doesn't tell us much about the cause. For example, the way this reads suggests the battery is fine one second then bad the next. That doesn't seem likely. Batteries don't suddenly/spontaneously discharge themselves.

What seems MORE likely is that the battery voltage sensing programming is faulty such that the system THINKS the battery is fine, but it's not. This assumption is bolstered by the text in the remedy section which states the software changes "will provide improved detection of 12V battery SOC [state of charge] during drive cycles, inhbit auto stop/start in the event of a low SOC, and provide notification to the driver if the battery is degraded."

The remedy section also states the updated software "will increase the alternator output threshold to maintain vehicle operation if a low 12V battery SOC is detected during a drive cycle." Starting the engine is the biggest draw on a car battery, and the alternator must output higher-than-normal current to recharge the battery after an engine start. The text of the recall suggests (to me) that alternator output with the current software is not sufficient to recharge the battery following engine start.

To me, this suggests there is nothing wrong with the batteries, it's a problem with the way the battery management software maintains battery.

 

[Cobrablues]

It has been reported Ford has the BCM and PCM software ready for the recall

make your appointment ?

“Remedy: FORD MOTOR COMPANY HAS AUTHORIZED YOUR DEALER TO REPROGRAM THE POWERTRAIN CONTROL AND BODY CONTROL MODULES FREE OF CHARGE SOFTWARE AND LABOR.”

I got the notice yesterday that the fix is ready. Good luck getting an appointment.
Update: I called Ford this morning and they have a mobile unit that will come to my house tomorrow morning and install the update. Unbelievable.

 

[ZQ8]

Mine gets done on 05/30/24.

 

[RushMan]

Mine's scheduled for next Tuesday, May 28, using Ford's pickup and return service.

 

[strckerie]

We have an appointment 6/3 with our dealership to update the necessary software on our 2021 BS BB.
They said it should take about 45 minutes. We'll have them check the battery too while we're there.

Sponsored